&lt;title&gt;Design of stiff, low-vibration floor structures&lt;/title&gt;

Amick, Hal; Hardash, Steven G.; Gillett, Paul; Reaveley, Ronald J.

doi:10.1117/12.56837

Cited by 13 publications

(12 citation statements)

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“…Unfortunately due to commercial sensitivities, studies of specific structures published in peer-reviewed journals that describe both vibration measurements and modal testing are scarce and provide little detail (Brownjohn & Pavic 2006). What is available mostly relates to generic design and performance of microelectronics facilities (Amick et al, 1991).…”

Section: Vibration Serviceability Of Industrial Floors In Singaporementioning

confidence: 99%

Floor Vibration Serviceability in a Multistory Factory Building

Pan

Middleton²,

Tan

et al. 2016

J. Perform. Constr. Facil.

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Experimental and analytical modal analysis and in-operation vibration measurements were performed on the massive concrete structural floors of several structurally connected 'units' of a six-level, multi-tenant industrial complex with total floor usable area exceeding 0.1km 2. The aim of the systematic study was to characterise vibration sources and factors that affect vibration serviceability, which is a major concern when changing usage patterns lead to conflicting requirements for vibration generation and tolerance for different types of industrial/commercial user. This was a rare investigation aiming to provide information on specific performance and relevant technologies for occupancy decisions by tenants and building management of similar structures. Floors evaluated were within different types of industrial single-occupant unit stacked up to six levels and having multi-bay floors with spans up to 12m with first vibration mode frequencies greater than 8Hz. These 'high frequency floors' display typical transient response behaviour to footfalls, with response levels controlled by modal mass. Units were studied in typical operational conditions including warehousing, instrument assembly and testing, light electronic/mechanical manufacturing and machining. Vibration sources included internal and external vehicles, human footfalls and machinery. The study showed the most onerous form of loading to be forklift trucks and that higher level floors of the same type were least serviceable. Experimental modal analysis showed a surprising range of modal properties for nominally identical floors of the same type and the relevance to performance of modal mass.

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Section: Vibration Serviceability Of Industrial Floors In Singaporementioning

confidence: 99%

Floor Vibration Serviceability in a Multistory Factory Building

Pan

Middleton²,

Tan

et al. 2016

J. Perform. Constr. Facil.

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“…Prior approaches for specification of microscope installation sites and nanoscale facilities utilized primarily frequency-based [2,4,[6][7][8][9],or time-based [3] criteria, or emphasized displacement vs. velocity vs. acceleration limits. As a result, it is more common to find a variety of measurements in the literature, including power spectral density, 1/3 octave spectrally filtered measurements and r.m.s.…”

Section: Generic Vibration Standards To Assess Ambient Conditions In mentioning

confidence: 99%

A Suspended Floor for High-Performance Electron Microscopy and Nanoscience

et al. 2004

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The recent article in this journal by O'Keefe et al provides an excellent introduction to the complexities that must be considered when embarking on the installation of a high-resolution electron microscope. It should not pass one's notice, however, that the advent of nanoscience has placed ever stricter attention on the control of vibration not just for analytical instrumentation but also for fabrication facilities. In addition to the thick isolated concrete slab-ongratie described in the above article, designs are coming into use (Fig. 1) that incorporate rigid “waffle” floor structures on closely spaced building columns and pneumatically isolated inertia slabs as are used, for example, in the subterranean portion of the NIST Advanced Metrology Laboratory. Each of these approaches might with time also find applications in the design of electron microscopy laboratories. However, each has the problem of rather high expense of construction.

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“…However, the vibration performance of a structure is affected by various structural design factors such as the (i) material (concrete, steel, and composite), (ii) supporting element of the floor (slab on grade, suspended slabs supported by columns), and (iii) floor shape (flat slab, waffle slab, etc. ), and therefore the appropriate system needs to be selected by taking into consideration the characteristics of each structural system [2,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation for the Microvibration Performance of a Segmented PC Method Based High Technology Industrial Facility Using 1/2 Scale Test Models

Kim¹,

Choi

2017

Shock and Vibration

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The precast concrete (PC) method used in the construction process of high technology industrial facilities is limited when applied to those with greater span lengths, due to the transport length restriction (maximum length of 15∼16 m in Korea) set by traffic laws. In order to resolve this, this study introduces a structural system with a segmented PC system, and a 1/2 scale model with a width of 9000 mm (hereafter Segmented Model) is manufactured to evaluate vibration performance. Since a real vibrational environment cannot be reproduced for vibration testing using a scale model, a comparative analysis of their relative performances is conducted in this study. For this purpose, a 1/2 scale model with a width of 7200 mm (hereafter Nonsegmented Model) of a high technology industrial facility is additionally prepared using the conventional PC method. By applying the same experiment method for both scale models and comparing the results, the relative vibration performance of the Segmented Model is observed. Through impact testing, the natural frequencies of the two scale models are compared. Also, in order to analyze the estimated response induced by the equipment, the vibration responses due to the exciter are compared. The experimental results show that the Segmented Model exhibits similar or superior performances when compared to the Nonsegmented Model.

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<title>Design of stiff, low-vibration floor structures</title>

Cited by 13 publications

References 0 publications

Floor Vibration Serviceability in a Multistory Factory Building

Floor Vibration Serviceability in a Multistory Factory Building

A Suspended Floor for High-Performance Electron Microscopy and Nanoscience

Experimental Evaluation for the Microvibration Performance of a Segmented PC Method Based High Technology Industrial Facility Using 1/2 Scale Test Models

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